From the PWGSC perspective we are, first and foremost, a common service provider. The act mandates the minister to provide certain functions, some of which are mandatory. For example, the provision of office space is mandated to the Minister of PWGSC, so if a federal government department needs office space, they are required to come to us. We are centrally funded to provide that as a common service.
There are other things we do through the act that are optional; indeed, departments may or may not come to us. In that capacity, we drive our portfolio—which is four-square in my function—to be as efficient as possible to maximize the use of taxpayer resources and save money wherever possible. At the same time, as Robert embodies, the Office of Greening Government Operations is there in a leadership function to assist other departments in achieving targets. That function is not mandatory but it is a well-used service, because they have their own objectives and targets as well.
Before I turn to Geoff, I would say that the policy function for the federal government rests with Treasury Board, so if you want to find an overriding Treasury policy that says you shall do it this way or that way, it would reside with that authority.